Tank-valve.



0. A. LiNDSTRGM.

Patented Nov. 3, 1908.

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0. A. LINDSTRGM TANK VALVE.

APPLIGATION FILED MAY 31,

Patented Nov. 3, 1908.

2 SEEETS-SHBET 2.

INVENTOR WITNESSES 'full,'clear, andexact description, reference beinghad to the accompanying drawings,

- of the contents.

the socket and fits within the groove 9 as the valve-stem to the valve;Fig. fis a detail 7 jects through the easing into the space beriNsirnsrarEs ha ifhrrr enrich.

CHARLES A. LINDSTROM, or ALLEGHENY, PENNSYLVANIA, ASSIGNOR TO .rRE-esEnSTEEL can COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF NEWwiner TANIQ-VALVE nofooaves.

1 Patented. Nov. 3, 190$.

Application filed May 31,1904. Serial No. 210,4021

T 0 all whom it may concern:

Be it known that 1, CHARLES A. LIND- sTRoM, of Allegheny, Alleghenycounty, Pennsylvania, have invented a new and useful Tank-Valve, ofwhich the following is a forming part of this specification, in which-Figure- 1' is a vertical central section of a valve constructed inaccordance with my invention; Fig. 2 is a horizontal section on the lineIIII of Fig. 1; Fig. 8 is asectional plan .view on the line III-III ofFig. 1 illustrating the preferred manner of connecting view of thevalve-stem; Fig. 5 is a partial vertical section and side elevation of atank for tank-cars fitted with my valve; and Figs. 6 and 7 arerespectively a plan and side view of themeans for lifting thevalve-stem.

The purpose of my invention is to improve the construction oftank-valves such as used for tank-cars in order to make it possible toempty the entire contents of the car when desired, and to provide forthe partial discharge A valve constructed in accordance with myinvention possesses advantages over those heretofore used in respect ofa simple and cheaper construction and a better provision against leaks.

In the drawing 2 represents the valvecasing or housing which is rivetedor otherwise secured as at 3 to the bottom of the tank 4, and has at itsupper end a seat 5 for the valve 6 which is swiveled on vertical stem 7.This stem preferably fits in a.- socket 8 at the top of the valve, andhas a peripheral groove 9, enabling it to be connected with the socketby a U-shaped cotter 10, which is inserted in shown in Figs. 1 and 3.The valve 6 is preferably formed with radial wings 6 between which 1s aremovable set screw 11 which protween two of the wings and thus enablesthe valve to move vertically ,but limits its turning motion; The valvehas adownwardly projecting sleeve 12 having a threaded por tion at itslower end in whichiitsth'e threaded stem 13 of a cap 14 which is adaptedto fit within he lower end of the casing 2 and has a thing: 1} bearingagainst a gasket or packing ring it at the end of the casing. The caphas a squared portion 17 for the application 1 of a'wrench by which itmay be turned, and

when so turned the stem 13 can be screwed into the sleeve -12, and thecap 14 thus brought towards of drawing the valve. to its seat 5 and ofseating the cap against the gasket 16, thus close ing the casing at bothends.

When it is desired to open the valve to permit the partial discharge ofthe contents of the tank, the cap llmay be turned so as to unscrew itsstein partially from the socket,

the valve 6, with the effect thus freeing the valve 6, which can then beraised and lowered vertically by means of its stem 7. By removing thecap 14 the valve 6 can be raised to cause the entire discharge of thecontents of the tank.

A part of my present invention consists in making the stem 13 a part ofthe cap 14, and the threaded sleeve 1.2 a part of the valve 6. Thisaffords a cheaper and stronger construction than if the stem were partof'the valve and were screw-threaded into the cap, for the housing 2must be of considerable length in order to extend below the center sillsof the car to which it is applied, and as the valve proper is frequentlymade ofbrass, while the cap is made of gray or malleable iron, I effect1 enables me to lift the valve either with a di- 'rect vertical motionor by a vertical motion produced by rotation of the stem as desired.

I prefer to employ the lifting device shown in Figs. ,5, 6 and 7 inwhich the stem at its upper end has a handle 18 within the tank whichbears upon an inclined are .19 forming part of a supporting bracket 20.By rotat ing the handle 15 along the arc in the direction of the arrowin Fig. 6 the stem and valve are raised after the cap has been loosenedor removed from the valve. At the end of the inclined are 19 is a recessand retaining notch 21 for retaining the handle at the end of itsmotion, thus keeping the valve open. The swiveled connection of the stemwith the socket is also of advantage because it enables the vaive to berotated by the cap 14' within the limits of the loose motion afforded bythe stop or setscrew 11. I

I claim:

1, In a discharge valve for tank cars, the

combination with a tubular casing having a .tosaidcasing and formed withinternal screw-threading in its lower end and a. 'lor the lower cap endof said casing having an elongated stein threaded to fit the of saidvalve. 2. In a discharge valve for tank ears, the combination with atnhulai' easing,- having a valve seat a t one end, a valve heated insaid casing shaped to lit said seat, short relatively to said casing andformed with internal screw-t]neading in its lower end, and a cap for thelower end of said casing havin a tapered elongated stein lower end ofsaid valve.

3. In a discharge valve for tank cars, a tubular casing, relativelythereto and having narrow elongated radial wings, a set screw in saidcasing projecting into a space between a pair of said Wings to permit alimited rotary movement of said valve, a valve stem, ste n elevating cammeans at the upper end of said stein, a peripheral groove in said stemat its lower end, a socket in the valve,

threaded to fit the lower end a U-shaped cotter a valve in said casing,short fitting in said grooveand socket and a female thread formed in thelower end of said valve in combination with a cap for the lower end ofsaid casing having a tapered elongated stein threaded to fit thefemale'th'read in said. valve.

4; In a discharge valve for tank cars, the combination witha tubulareasing havinga valve seat in one end, a valve located in said easing,short relatively thereto, shaped to iit

